TY - JOUR
AB - 2C4 PROF. H. A. WILSON : THE THEORY OF XVIII. The l’lieory of “Moaitig Coil” and other kinds of By Prof. HAROLD A. WILSON, Ballistic Galvanometers. MA., D.S‘C., M.Sc., F.R.S.” A FORMULA which is usually given for liallistic galvano- meters is where Q =quantity of electricity passed through galvanometer. H = magnetic field controlling the galvanometer-needle. G = magnetic field at needle, supposed perpendicular to H, due to unit current in the coil. T =time of a complete oscillation of the needle. B =angle of swing of‘ the needle from rest corrected for damping. If c$ is the steady angular deflexion clue to a currenl i, then .H t= -tan+; so that Ti sin $12 Q= r tan 9 * Tlie above forinula: are of course, strictly speaking, only applicable to ballistic golvanometers consisting of a coil of wire having a single mall inagnet freely suspended at the centre of the coil, and arranged so that at its equilibrium I’osition the axis of the inngnet is in the plane of the coil. In the following paper the proper formu!= for ballistic gJvanometers of several types in general use :ire obtained, and it is found that in severnl caws they 
TI - The Theory of "Moving Coil" and other kinds of Ballistic Galvanometers
JF - Proceedings of the Physical Society of London
DO - 10.1088/1478-7814/20/1/319
DA - 1906-01-01
UR - https://www.deepdyve.com/lp/iop-publishing/the-theory-of-moving-coil-and-other-kinds-of-ballistic-galvanometers-5SIaIHD0bP
SP - 264
VL - 20
IS - 1
DP - DeepDyve
ER -